Thank you, William.
Original Message:
Sent: 02-19-2023 04:57 PM
From: william fitch
Subject: Requirement for roof tile requirement
That does not look like a really low pitch, like 3/12 or something. No snow than you are left with wind loads and rain loads. I get the feeling that the 7K$ is already gone. If true, that will be messy trying to recover unless "local" laws have allot of leeway.
There is a reason why the old adage, "buyer beware" is what it is....
------------------------------
william fitch
Owner
www.WeAreSolar.com
Original Message:
Sent: 02-19-2023 01:08 PM
From: FRED YI
Subject: Requirement for roof tile requirement
Thank you, william.
I'm in northern California. The house was built in 2006. The roof is in very good condition. Basically, we don't have snow load here. The sales agent keeps saying they are a large company and trying to do good work. Just wanted to know whether I can make a claim against this comapny.
------------------------------
FRED YI
Original Message:
Sent: 02-18-2023 08:09 AM
From: william fitch
Subject: Requirement for roof tile requirement
First off, where are you? Regulations vary based on location. Second, PV panel load is widely distributed across an area. A typical 41 x 62" panel (~17sqft) weighs 40 Lb. That's approx. 2.4Lb per sqft, which is frankly nothing. A double or triple shingled roof has more total load. Most res construction is designed for a minimum of 20 Lb per sqft. In reality a res roof can easily hold 50 Lb per sqft, though that is not necessarily a good load for 100% duty cycle, etc... warping, etc..
12" of wet snow weighs approx. 13 Lb sqft. 2 feet would be 26 Lb. sqft. etc..
Another practical data point is how old is the roof? 5 years or 50 years. 2x6 or 2x8 or 2x10 roof rafters, pitch, etc.. all effect downward pressure and structural load points. The steeper the roof the more load is shifted to the exterior walls off the center, and so on....
So 2.4, IF IT WERE ME, I would tell him to go pound sand.... but that's just blunt me....
------------------------------
william fitch
Owner
www.WeAreSolar.com
Original Message:
Sent: 02-17-2023 02:14 PM
From: FRED YI
Subject: Requirement for roof tile requirement
Hi, I installed a second solar system on my roof by SunPower. The sales guy told me that my roof was 9.7lb tile. It has to be removed and replaced with a single flat roof single. It cost me an additional more than $7k. When I checked the old solar system on my roof, it was directly installed on the original roof without any changes to it. The sales agent of the solar told me that all new solar system requires replacing the original roof if it's 9.7lb tile.
My neighbor just installed solar yesterday. They have exactly the same roof as mine. I found that their system is directly installed on the original roof.
My question is that is it true about 9.7lb tile needed to be replaced for solar installation?
Thank you.
------------------------------
FRED YI
------------------------------